21097821

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{3989}}^1$

素因数の和:4076

約数の個数: 16

約数和(自身を含む): 29494080

約数和(自身を除く): 8396259

約数列:

[1, 3, 41, 43, 123, 129, 1763, 3989, 5289, 11967, 163549, 171527, 490647, 514581, 7032607, 21097821]

約数ペア:

[(1, 21097821), (3, 7032607), (41, 514581), (43, 490647), (123, 171527), (129, 163549), (1763, 11967), (3989, 5289)]